/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package com.aliyun.odps.mapred;
import java.io.IOException;
import com.aliyun.odps.data.Record;
/**
* Mapper 的空实现，详情请参见 {@link Mapper}
*/
public class MapperBase implements Mapper {
@Override
public void setup(TaskContext context) throws IOException {
}
@Override
public void map(long key, Record record, TaskContext context)
throws IOException {
}
@Override
public void cleanup(TaskContext context) throws IOException {
}
public void run(TaskContext context) throws IOException {
setup(context);
while (context.nextRecord()) {
map(context.getCurrentRecordNum(), context.getCurrentRecord(), context);
}
cleanup(context);
}
/**
* @Deprecated Use {@link #setup(com.aliyun.odps.mapred.Mapper.TaskContext)} instead.
*/
@Deprecated
public void setup(com.aliyun.odps.mapred.TaskContext context) throws IOException {
}
/**
* @Deprecated Use {@link #map(long, Record, com.aliyun.odps.mapred.Mapper.TaskContext)} instead.
*/
@Deprecated
public void map(long key, Record record, com.aliyun.odps.mapred.TaskContext context)
throws IOException {
}
/**
* @Deprecated Use {@link #cleanup(com.aliyun.odps.mapred.Mapper.TaskContext)} instead.
*/
@Deprecated
public void cleanup(com.aliyun.odps.mapred.TaskContext context) throws IOException {
}
}